Journal of Fluids and Structures vol:48 pages:169-187
Computational models of vocal fold (VF) vibration are becoming increasingly sophisticated, their utility currently transiting from exploratory research to predictive research. However, validation of such models has remained largely qualitative, raising questions over their applicability to interpret clinical situations. In this paper, a computational model with a segregated implementation is detailed. The model is used to predict the ﬂuid–structure interaction(FSI) observed in a physical replica of the VFs when it is excited by airﬂow. Detailed quantitative comparisons are provided between the computational model and the corresponding experiment. First, the ﬂow model is separately validated in the absence of VF motion. Then, in the presence of ﬂow-induced VF motion, comparisons are made of the ﬂow pressure on the VF walls and of the resulting VF displacements. Self-similarity of spatial distributions of ﬂow pressure and VF displacements is highlighted. The self-similarity leads to normalized pressure and displacement proﬁles. It is shown that by using linear superposition of average and ﬂuctuation components of normalized computed displacements, it is possible to determine displacements in the physical VF replica over a range of VF vibration conditions. Mechanical stresses in the VF interior are related to the VF displacements, thereby the computational model can also determine VF stresses over a range of phonation conditions.